Typewriting-machine



J. S'OKOLOV. TYPEWRITING MACH]NIEJIl-{z };v APPLICATION FILED FEB. 9. 1911.

1,347,187,. I Patented July 20,1920.

UNITED STATES PATENT OFFICE.

OF NEW YORK, N. Y., ASSIGNOR T0 UNDERWOOD TYPEWRITER YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITIN G-MACHIN E.

To all whom it may concern e it known that I, JAooB SoKoLov, a citizen of the United States, residing in borough of the Bronx, in the county of the Bronx, city and State of New York, have invented certain new and useful Improvements in Typewriting-lVIachines, the following is a specification.

This invention relates to means for governing the speed of typewriting machine carriages when released from the control of the letter-feeding devices at the tabulating operation.

One of the objects of the invention is to provide a typewriter carriage-speed-governor which is of simple and inexpensive construction, effective in operation, readily ad-' justable to secure the desired control of thecarriage, adapted to small and large carriages, of securing such desired.

One of the principal features of the present invention resides in the provision of friction plugs, usually of leather, loosely mounted upon the centrifugal weights of the speed-governor, the weights with the plugs being inclosed within a casing, and the plugs preferably occupying positions between the inner surfaces of the cap and the bottom of the casing, capable of being variably posit1oned with respect to said surfaces by the adjustment of the cap, which, for this purpose, is threaded into the casing, a turn of the cap producing the desired variation. Preferably the cap is cupped or interiorly coned, and the plugs are correspondingly formed, thereby increasing the efliciency of the plugs and hence of the centrifugal speed-regulator. By a proper adjustment of the cap, excessive lost motion between the centrifugal weights which carry the friction plugs and the surfaces by which their movements are limited may be avoided. Such adjustment may be effected by turning the cap inwardly until further rotation is opposed by engagement between the friction plugs and the surfaces with which they re-act, and by then giving the cap a slight backward or outward rotation to afford a clearance. This would leave the plugs free of their re-acting surfaces, but in condition to be brought into frictional contact by a slight movement of the centrifugal weights. Should the permissible movement of the rate of speed as may be Specification of Letters Patent. I

of which and, within certain limits, capable and preferably Patented July 20, 1920.

weights be undu the wearing away of the surfaces of the manner.

The adjustment of the cap also serves as a means for controlling the velocity of movement of the carriage during a tabulation, since, as will be tiveness of the governor would vary with any variation in the radial position of the friction plugs. In other words, should the plugs be permitted to engage their re-acting surfaces at a greater distance from the center, the centrifugal force applied by the weights would be increased as well as the radius of the turning moment or couple involved, both of which would serve to reduce the velocity of movement of the typewriter carriage.

The increased outward movement of the centrifugal weights, which would result from wear of the friction plugs, would, therefore, cause the typewriter carriage to travel at a slower rate of speed during tabulation, but the normal speed may be readily restored by the adjustment afforded by the turning of the cap, as above described. Should the slower movement be desired, it may be readily attained at any time by the outward adjustment of the governor cap.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a sectional elevation of an Underwood standard typewriting and tabulating machine, showing the speed-governor attached thereto.

. Fig. 2 is a perspective view of the speedgovernor, the cover removed, and part of the casing broken away to show the mechanism therein;

Fig. 3 is alongitudinal section of the governor and adjusting cover.

Fig. 4 is an end view of Fig. 3 with the cover or' cap removed.

Fig. 5 is a detail perspective view of the adjusting cover.

Fig. 6 is a detail'perspective View of one of the Weights and its brake member which is prefrably of leather or other friction material.

Fig. 7 is a sectional view taken through the leather brake members or plugs.

Fig. 8 is a partial view in section, showv escapement dogs ment pinion '15, and imparts i pivoted on imechanism comprising a shaft I ing a weight actuated and one of the brake against the adjusting membersbearing cover and the casing.

The type-keys 10 are mounted on key levers 11 to actuate through the intermediary of bell cranks 12, to swing type-bars 13 upwardly and rearw'ardly against the platen 14, mounted on a carriage 15.

Each of the type-bars 13 includes a heel 16, which, at the depression of its associated key, engages a universal frame 17 to rock 18 engaging an escapement 19 to rotate a pinion 20 mounted thereon. Said pinion meshes with a releasable rack 21 mounted on the carriage a 'step-by-step movement thereto in a letter-feed direction.

The rack 21 is mounted on arms 22 i the carriage 15, so as to swing out of engagement with the pinion 20 to permit the carriage to travel in letter-feed direction findepenc ently of the above-described escapement mechanism, under tension of a sprinv'motor 23 connected to the carriage 15 by a strap 24. 7

Such an operation is termed tabulatin and is accomplished by means of tabulator keys 25, which, when depressed, thrust counter-stops 26 into the path of settable stops 27 mounted on a rack 28 on the car'- riage 15. a cut-out portion or shoulder 29 engaging a universal bar 30 mounted on a rock shaft 31, so that when a counter stop is projected. the shaft 31 is rocked and draws down a link 33 through the intermediary of a rock arm 32, to swingthe governor 34 carrying a pinion 35 fast on the governor shaft 36 into mesh with the carriage rack 21. An anti-friction roller 52, loose upon said shaft 36, at the same time engages the rack 21 to lift it out of engagement with the escaperun forward until a stop 27 is intercepted by a projected counter-stop 26. i

To control the'speedof the carriage, there is provided a governor or friction-brake '37 fast on the casing 34 and journaled in the framework 1 of the typewriter. Fast upon one end of this shaft is a rock arm 38 having a in-and-slot connection with link to rock said shaft 37 and swing lease rack 21 when a tabulator pressed.

The casing 34 comprises a hub or hearing 39 in which is journaled the shaft 36. Fast upon said shaft is the pinion 35 which is key is derotated by the rack 21 when a tabulating Each of the counter-stops 26 has 7 20, permitting the carriage to casing 34 to re- Eacharm has a cut-out portion 44 Fig. 6, into which fitsa floating plug 45, beveled as at 46 and composed of leather or some other fibrous friction material. Upon rotation of shaft 36 the weighted arms 42 'are adapted to be centrifugally operated to wedge the floating plugs between the converging friction surfaces, that is, to cause the plugs to bear against the plane surface 47 of the casing 34, by reason of thesurface 46 bearing against a beveled portion 49 of the cap or cover 48. 1

To maintain the proper relation between the friction plugs and the surfaces against which they react and to govern the speed of the carriage 15, the cover or cap 48 is provided with a threaded portion 50 to-fit into the casing 34. By means of the thread thereon, the cover 48, when turned, is adapted to be moved in or out so as to adjust the normal clearance spaces between the beveled surface 49 and the beveled plugs, and between the plugs and the surface 47. The turning of the cap also aflords means for varying the speed of the shaft 36, and therethrough the speed of the carriage in letter-feed direction; an inward adjustment ofthe cap mitting the carriage to run more rapidly. Means are provided whereby the adjusted cover may be held against displacement, comprising a knurled or milled portion '53 on the adjusting'cover 48 engaging with a spring-pressed detent 51 fast to the casing 34, to yieldingly lock the cover 48 against accidental movement, although the cap or cover may be readily rotated by the operator. 1

The governor is so mounted at the rear of the machine that the adjusting cap or cover improvements may be used without others. Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a traveling carriage, of a centrifugal governor for said carriage, said governor comprising a shaft, means for through which said shaft may be rotated in accordance with the movement of; said car riage, centrifugal arms carried by said shaft, friction contact elements carried by said arms, and opposed re-action surfaces carried by said governor to receive the thrust of said contact elements when urged outwardly by said arms, one of said re action surfaces being beveled or conical so that outward movement of said arms will have a tendency to wedge, the contact ele-' ments between the opposed reaction surhaving the effect of perbe resorted to within the scope of the invention, and portions ofthe' connecting said shaft to said carriage, and

nation with a traveling carriage, of a centrifugal governor for said carriage, said governor comprising a shaft, means for connecting said shaft to saidL carriage, and through which said shaft may be rotated in accordance with the movement of said carriage, centrifugal arms carried by said shaft, loosely-mounted friction contact elements'carried by said arms, and opposed reaction surfaces carried by said governor to receive the thrust of said contact elements when urged outwardly by said arms, one of said re-action surfaces being beveled or conical, and serving as a means for urging said loosely mounted contact elements against the oppositely-disposed re-action surface.

3. In a typewriting machine, the combination with a traveling carriage, of a centrifugal governor for said carriage, said governor comprising a shaft, means for connecting said shaft to said carriage, and through which said shaft may be rotated in accordance with the movement of said carriage, centrifugal arms carried by said shaft, loosely-mounted friction contact elements carried by said arms, and opposed re-action surfaces carried by said governor to receive the thrust of said contact elements when urged outwardly by said arms, one of said reaction surfaces being beveled or conical, and serving as a means for urging said looselymounted contact elements against the oppositely-disposed re-action surface, the part of said governor carrying one of said re-action surfaces being adjustable so as to be capable of varying the relations between said contact elements and their re-action surfaces.

4L. In a typewriting machine, the combination with a traveling carriage and a device for tensioning said carriage, of an escapement mechanism therefor, means for releasing said carriage from said escapement mechanism, a governor for said carriage adapted to be made effective by said releasing means, said governor comprising a shaft to be rotated by the travel of the car riage, a casing, centrifugal arms to be thrown out by rotation of the shaft, friction plugs forming part of said arms, said casing comprising a cover having an internal beveled face, beveled faces on said friction plugs corresponding to the beveled face on the cover, means for adjusting the position of the cover relatively to the plugs, flat bases on said plugs opposite said beveled faces, and a rear flat face on said casing against which said plugs are adapted to be forced by the beveled facesl 5. In a typewriting machine, the combination with a traveling carriage, of a shaft adapted to control the speed thereof, a head upon said shaft, centrifugal arms upon said head, a casing within which said centrifugal arms rotate, comprising converging beveled and flat faces, and a fibrous plug lying within an opening in each arm, each plug comprising a flat face and a beveled face, by whch it frictionally engages the corresponding surfaces of the casing; means being provided to secure relative adjustment between the plugs and the converging faces, to regulate the speed of the carriage.

6. In a typewriting machine, the combination with a traveling carriage, of a shaft to control the speed thereof, head upon said shaft, centrifugal arms pivoted upon said head, a casing comprising beveled and flat faces between which said centrifugal arms rotate, a yielding friction surface upon each arm, each surface comprising a flat face and a beveled face by which it engages the corresponding surfaces of the casing, one of said faces provided upon an adjustable cover, and means whereby said cover may be detained at different adjustments.

7. In a typewriting machine, the combination with a traveling carriage and a shaft adapted to serve as a governor therefor, of a head upon said shaft, weighted centrifugal arms eccentrically pivoted upon said head, a fibrous plug loosely occupying a recess in each arm, a casing comprising a flat surface, and a cover adjustably threaded upon the end of said casing, said cover having a beveled surface, said plugs having surfaces to bear against the beveled surface on the cover, to force the plugs against said flat surface.

8. In a typewriting machine, the combination with a traveling carriage having a rack, of a shaft, a pinion upon said shaft to mesh with said rack, a governor comprising arms upon said sha a casing comprising flat and beveled surfaces surrounding said shaft, and fibrous plugs within said arms to engage and be wedged between said surfaces.

9. In a typewriting machine, the combina tion with a traveling carriage having a rack, of a shaft, a pinion upon said shaft to mesh with said rack, a governor comprising arms upon said shaft, a casing comprising flat and beveled surfaces surrounding said shaft, and fibrous plugs within said arms to engage and be wedged between said surfaces, one of said surfaces provided upon a cover which is adjustable to vary the distance between said surfaces.

JACOB SOKOLOV. lVitnesses:

ARTHUR A. J oHNsoN, CATHERINE A. NEWELL.

a transverse- 

